Mn-doping induced ferromagnetism and enhanced superconductivity in Bi_(4−x)Mn_xO_4S_3 (0.075 ≤ x ≤ 0.15)
Creators
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1.
Shanghai University
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2.
Shanghai University of Electric Power
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3.
Zhengzhou University
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4.
California Institute of Technology
Abstract
We demonstrate that Mn doping in the layered sulfides Bi_4O_4S_3 leads to stable Bi_(4−x)Mn_x O_4S_3 compounds that exhibit both long-range ferromagnetism and enhanced superconductivity for 0.075 ≤ x ≤ 0.15, with a possible record superconducting transition temperature (T_c ) ∼15 K among all BiS_2-based superconductors. We conjecture that the coexistence of superconductivity and ferromagnetism may be attributed to Mn doping in the spacer Bi_2O_2 layers away from the superconducting BiS_2 layers, whereas the enhancement of T_c may be due to excess electron transfer to BiS_2 from the Mn^(4+)/Mn^(3+) substitutions in Bi_2O_2. This notion is empirically corroborated by the increased electron-carrier densities upon Mn doping, and by further studies of the Bi_(4−x)A_xO_4S_3 compounds (A = Co, Ni; x=0.1 , 0.125), where the T_c values remain comparable to that of the undoped Bi_4O_4S_3 system (∼4.5 K) due to lack of 4+ valences in either Co or Ni ions for excess electron transfer to the BiS_2 layers. These findings therefore shed new light on feasible pathways to enhance the T_c values of BiS_2-based superconductors, although complete elucidation of the interplay between superconductivity and ferromagnetism in these anisotropic layered compounds awaits the development of single crystalline materials for further investigation.
Additional Information
© 2016 American Physical Society. Received 24 January 2016; revised manuscript received 6 August 2016; published 30 August 2016. The research at Shanghai University was supported by the Chinese Ministry of Science and Technology (2016YFB0700504), Shanghai Pujiang Program (13PJD015), Science & Technology commission of Shanghai Municipality (13ZR1415200, 13JC1402400, 11dz1100305), and National Natural Science Foundation of China (NSFC, No. 51372149, No. 51371111, No. 51302249, and No. 11204171). The authors acknowledge the technical support by the beam line BL14B1 of Shanghai Synchrotron Radiation Facility for the XPS studies. The research at Caltech was supported by the National Science Foundation in the US under the Institute for Quantum Information and Matter (IQIM), and by the Gordon and Betty Moore Foundation and the Kavli Foundation through the Kavli Nanoscience Institute at Caltech. W.-S. T. acknowledges partial support from the Dragon Gate Program by the Ministry of Science and Technology in Taiwan.Attached Files
Published - PhysRevB.94.064522.pdf
Submitted - 1608.04410v1.pdf
Files
1608.04410v1.pdf
Additional details
Additional titles
- Alternative title
- Mn-doping induced ferromagnetism and enhanced superconductivity in Bi4−xMnxO4S3 (0.075 ≤ x ≤ 0.15)
Identifiers
- Eprint ID
- 70062
- Resolver ID
- CaltechAUTHORS:20160831-093114980
Related works
- Describes
- https://arxiv.org/abs/1608.04410 (URL)
Funding
- Ministry of Science and Technology (China)
- 2016YFB0700504
- Shanghai Pujiang Program
- 13PJD015
- Shanghai Municipality Science and Technology Commission
- 13ZR1415200
- Shanghai Municipality Science and Technology Commission
- 13JC1402400
- Shanghai Municipality Science and Technology Commission
- 11dz1100305
- National Natural Science Foundation of China
- 51372149
- National Natural Science Foundation of China
- 51371111
- National Natural Science Foundation of China
- 51302249
- National Natural Science Foundation of China
- 11204171
- Institute for Quantum Information and Matter (IQIM)
- Gordon and Betty Moore Foundation
- Kavli Foundation
- Kavli Nanoscience Institute
- Ministry of Science and Technology (Taipei)
Dates
- Created
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2016-08-31Created from EPrint's datestamp field
- Updated
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2021-11-11Created from EPrint's last_modified field